To calculate the percentage of the down payment relative to the purchase price, you can use the following formula:
\[ \text{Percentage} = \left( \frac{\text{Down Payment}}{\text{Purchase Price}} \right) \times 100 \]
a. Calculate the percentage of the down payment of $28,000 from the purchase price of $140,000:
\[ \text{Percentage} = \left( \frac{28,000}{140,000} \right) \times 100 \]
\[ \text{Percentage} = \left( 0.2 \right) \times 100 = 20% \]
So, the down payment is 20% of the purchase price.
b. Now, calculate the percentage of a $7,000 down payment from the purchase price of $140,000:
\[ \text{Percentage} = \left( \frac{7,000}{140,000} \right) \times 100 \]
\[ \text{Percentage} = \left( 0.05 \right) \times 100 = 5% \]
So, a $7,000 down payment would be 5% of the purchase price.